Ultrasonic transducer, method for operating an ultrasonic transducer, and method for measuring distance
OwnerJohannes Kofler, Amira Hedhiliinventors
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Abstract
In an embodiment an ultrasonic transducer includes a membrane disposed in a housing, an actuator and a damper, wherein the actuator is configured to excite the membrane to oscillate in a sending mode for emitting an ultrasonic wave, wherein the damper is configured to dampen a post-excitation ringing of the membrane and to excite at least one damping mode that is different from the sending mode, and wherein at least one side wall of the housing has at least one thickness such that the sending mode and the damping mode are stably excited.
Claims24
-23. (canceled)
An ultrasonic transducer comprising:
- a membrane disposed in a housing;
- an actuator;
- and
- a damper,
- wherein the actuator is configured to excite the membrane to oscillate in a sending mode for emitting an ultrasonic wave,
- wherein the damper is configured to:
- dampen a post-excitation ringing of the membrane, and
- excite at least one damping mode that is different from the sending mode, and
- wherein at least one side wall of the housing has at least one thickness such that the sending mode and the damping mode are stably excited.
A method for operating an ultrasonic transducer comprising a membrane in a housing, the method comprising:
- exciting the membrane to emit an ultrasonic wave, wherein a first membrane oscillation comprising a stable sending mode with a sending frequency is excited;
- and
- damping a post-excitation ringing, wherein a second membrane oscillation having a stable damping mode with a damping frequency is excited, wherein the damping frequency and the sending frequency are different.
Dependencies are inferred from the claim text.